As the New Republic unified and expanded, internal schisms fractured the Imperial Navy, and a number of splinter factions vied for control of the Empire's remaining holdings. Grand VizierSate Pestage, who had assumed control of the majority of the Empire's forces after Palpatine's death, made arrangements to defect to the New Republic after he discovered that Ysanne Isard, Director of Imperial Intelligence, plotted to overthrow him. Isard informed the Empire's Ruling Council of Pestage's defection, and the former Grand Vizier was captured. As the New Republic Provisional Council debated rescuing Pestage, it was ultimately Councilor Kerrithrarr's words that swayed the operation's key decrier, Borsk Fey'lya, to support the rescue.[10]

As the New Republic continued to wrest worlds from Imperial control, Councilor Fey'lya called for a summit of the Provisional Council in order to discuss taking control of the planet Coruscant, the galactic capital for both the Empire and its predecessor, the Old Republic. Fey'lya knew that he would butt heads with Councilor Ackbar, and selected the planet Noquivzor to be the summit's location, as its warm, dry savannas would be an uncomfortable setting for his predicted opponents. Kerrithrarr, who was from the heavily forested Kashyyyk, was among those targeted by the subtle manipulation. While all of the councilors agreed that taking Coruscant was vital, and would greatly benefit perceptions of the New Republic, they disagreed on which methods were needed to secure the planet. After Noquivzor was attacked by Zsinj, a former Imperial Admiral and a powerful, self-proclaimed Warlord, Ackbar eventually supported Fey'lya's tactical proposals. Ackbar believed that the conquest of Coruscant needed to be hastened so the New Republic could sooner focus bringing Zsinj to justice.[1]

As the New Republic took control of Coruscant, Ysanne Isard released a virulent plague into the planet's lower levels. While discussing the plague, Kerrithrarr suggested a militarized approach to quarantine the spread of the virus.[11]

In 17 ABY, the New Republic senate suffered a series of bombings attributed to Kueller, a former student of the Jedi Praxeum who had turned to the dark side of the Force. An emergency vote to replace the delegates lost in the attacks with former Imperials was held. Senator Kerrithrarr voted in the minority, and was one of only fifteen senators to oppose the emergency elections.[12]